S1P receptor agonist; undergoes phosphorylation by sphingosine kinase 2, which then binds S1P1,3,4 and 5 receptors (EC50 values are 0.3 - 0.6 nM for S1P1, 4 and 5 and ~3 nM for S1P3). Immunosuppresant; sequesters lymphocytes in lymph nodes, reducing autoimmune response. Suppresses the development of EAE (an in vivo model of MS). Orally bioavailable and blood-brain barrier permeable. Purity 99%. MW (observed): 343.93